Finding the Fourth Proportional to 80,947.89, 121,430.61 and 31,070.25

Step by Step Solution

1. Step 1: Write the proportion equation
   80,947.89 : 121,430.61 = 31,070.25 : x
2. Step 2: Convert to fraction form
   80,947.89/121,430.61 = 31,070.25/x
3. Step 3: Cross multiply
   80,947.89x = 121,430.61 × 31,070.25
4. Step 4: Simplify right side
   80,947.89x = 3,772,879,410.35
5. Step 5: Solve for x
   x = 3,772,879,410.35/80,947.89
6. Step 6: Final answer
   x = 46,608.74